The Duke of Cambridge paid a visit to the Royal Marsden Hospital in London on Wednesday, where he watched Professor Vinidh Paleri and his medical team perform a minimally invasive procedure on a patient battling adenoid cystic carcinoma, a rare form of cancer. The second surgery was for a patient who had a tumor on their esophagus.

"Performing head and neck surgery with the da Vinci robot reduces what would be a 12-hour open surgery operation into a two hour operation," Vinidh explained in an article posted on the hospital's website. "Patients can be home in three days rather than two weeks, and they are saved from having visible scars."

The Duke joins Professor Vinidh Paleri and his team in theatre as they perform minimally invasive robotic surgery on a patient with adenoid cystic carcinoma. pic.twitter.com/6Gq8dsoPa2

Switching out of his dark blue scrubs and into a more formal outfit, the 35-year-old royal, who is president of The Royal Marsden NHS Foundation Trust, also was given the opportunity to chat and mingle with patients and staff at the hospital.

According to a tweet from Kensington Palace, "The Royal Marsden has the largest and most comprehensive programme of robotic surgery for cancer in the UK, revolutionising the way cancer patients are treated."

The Royal Marsden has the largest and most comprehensive programme of robotic surgery for cancer in the UK, revolutionising the way cancer patients are treated.

In more royal news, Prince William will be a third-time father, as his wife, Kate Middleton, is pregnant. Hear more on their adorable announcement -- and how Prince George and Princess Charlotte feel about it! -- in the video below.